Tool-chuck



CARR. n TOOL CHUCK.

APPLICATION FILED .|ULY 29, 1920.

Patented 0011s. M, 1921.,

J. CARR.

TOOL CHUCK.

APPLICATION FILED 1uLY29, 1,920.

Patented 0015.111, 11921.,

ZSHEETS fig Y I L J i /r Arran/ver Cfr ` raisins sans, orsvnacuss, usw YORK.

` Toon-critica;

releases.

To all w w/m, t may concern.'

Be it known 4that l, JAMES euse, inthe `county of Onondaga,in the State of New York, have `invented new and useful Improvements in Tool-Chucks, of which the following, taken in connection with the ac companying drawings, is a full,` clear, and` exact description. l

Thisinvention relates to centering and decentering tool chucks for.' milling and boi ing machines, drill presses, lathes and other apparatus yin which the cutting tool and work are relatively rotated to effect a cutting operation at the center orat one side of the center of the work, thebroad jobject being somewhat similar to that set forth in iny Patents No. 1,125,649,1and No. 1,125,650,

both issued Jan. `19, `1915, except that in the. present application l have sought to increase the efliciencyand de-centering range of ad-l justment of the tool relatively to theaXis of rotation, and, atthe same time, to reduce the number of parts yof the chuck, and' to thereby increase its strength, to` reduce the cost ofinanufacture and'to make it more serviceable for light or heavy work.

Another object is to simplify the adjustment or de-centering of the tool and to provide means whereby it `maybe automatically adjusted step by step radially ofthe axis of revolution.`

Other objects and uses relating to specific parts ofthe chuck will be brought out in the' following description.

In the drawings: Figure lis a front elevation of a chuck embodying the various features of my invention, shown as operatively mounted upon a revoluble part of a machine to which it is applied, and also showing by dotted lines a` portion of a cutting tool. Y j, Fig. 2 is an end face view of the` chuck j shown in Fig. 1.

Figs.` 3, 4;, 5` and 6, are sectional views g taken, respectively, on lines 3 3, and 4- 4.

Fig. 1, and 5 5, and 6 6, Fig.` 2. f Fig. 7 is an end view of a modified form Y of chuck showing the wrench by dotted lines for effecting `one of the adjustments.

Fig. 8 is side `elevation ofthe chuck shown in Fig. 7.

Figs. 9 and 10 are longitudinal sectional views taken, respectively on lines 9 9 and `10-10, Fig. 7. Y i

Figs. 11` and 12A are perspectiveviews of CARR, of Syra-` the detached tool supporting jaw and cla1np- 1n0f}screw for the tool, respectively.

y Fatented ct.. '11, 11921.

Application filed July 29, 1920. Serial No. 399,691.

Fig. 13 is a perspective view of a detached adjusting screw for the toolsupporting jaw. Figs. 14 and 15 are perspective views of the two parts of the jaw clamping means.

`The chuckshown in Figs. 1 to 6, inclusive, may be mounted upon a revoluble support A and comprises a'radially elongated head 1 a sectionaltool adjusting member 2- a screw.. 3 `for adjusting the member 2-, a sectional tool clamping cle- .vice- 11 and one or more additional clamping devices 5 forholding the tool adjusting member in its adjustedposition, all of `which parts are preferably made `of machine steelor equivalent metal capable A,of withstanding the `strains to which. they are subjected. 4

Th'ehead 1 is provided at one side with a 'boss 6 having a threaded socket.

7 adapted to screw upon an externally threaded boss en of the revoluble support Arwhereby the-head may be rotated,

Valthough, it is evident that `the head may be held stationary and the work rotated when desired, or `when operating upon special work, said head being also providedwith a diametrical guide opening 8- extending radially therethrough from end `to endfor receiving and supporting thetool adjusting member Q therein and for guiding said member in its radial adjustment.

soV

This guide opening 8 is substantially i cylindrical in cross-section and its outer or front end wall is provided with a radially i extendinglengthwise `slot 9- terminating at` itsends short of the ends of the head 1 1 so that the walls Aentirely aroundthe guide opening 8 may beintegrally con nected to the main body of the head thereby avoiding the necessity for an eXtra stiffening orV strengthening plate at either end of the uide opening.

The adjustable tool receiving and supportof sepa-rate sections 10 and 11 arranged coaXially end to end and slidable endwise within the guide opening 8-` both-of said sections beingsubstantially cyv ing member; 2 consists, in this instance,

lindrical in crossesections to closely fit within saidOpening, except that the inner side of the section 10 is provided with a `concave recess 12 conforming in trans verse conteur to the` curvature oftheadwstv latter in one direction or the other will move the section -10- endwise in the guide opening -8- and will transmit endwise motion to the section l1 when moved in the proper direction.

The section -llof the member -2 is of the same diameter as the section lO- and is provided with a series of, in this instance 3, diametrical holes 13; therethrough for receiving the shank of a cutting tool -B-, a portion of which is shown by dotted lines in Figs. l, 2 and 3, and by full lines in Fig. 4, said tool receiving holes being arranged in radially spaced relation to the axis of revolution of the chuck or work. The innermost tool hole-13* is movable into and out of coaxial alinement with the axis of revolution of the head or work, while the'meeting endsy otv the ltool adjusting sections -lO.- and -ll*' arev arranged to register with the inner end ot the adjusting screw 3f when the innermost hole -13- is -coaxial with the axis of revolution of the head or work, and maybetermed the zero position of adjustment ofthe member 2ffor ,causing'the tool to operate upon the center of the work as in boring and similar operations.

The member is, however, shown as adjusted to bring the innermost openingsv 13.- at one side of the center for decentering the tool .B- to operate upon the work at one side of the center either by axial movement or by further radial movement as produced by the operation of the/adj usting screw -3-. Y

iThe inner wall of each of the openings -13- is somewhatVV-shaped so that if the shank of the tool #B+ is cylindrical, it

will engage said wall at two pointsonly at vopposite Vsides of the longitudinal center of the sectionll.

A set screw w14- is movable endwise in a central lengthwise 'opening 15-v in the section -,-ll of thetool adjusting member -2f for engaging the outer face of the tool -B and clamping the same in place against the innerwall o'toneof the openings -13-, said set screw consisting in this instance of an innerA` section 1G- A'and' an" outer section TZ- kthe outer section *17- beingof relatively larger diameter than the innery section and threaded externallyY to form a screw engagingv the internally threaded outer end of the opening l5- for 'clamping and releasing the tool -Bf TheA V only object in making the tool receiving i Ymember -2- in sections is 'for convenience in cutting the thread upon 'the section *l0-k, as,V otherwise, both sections might be 'integrallyunited ormade in'one piece',

The object in making the set screw 4- in sections is to permit the use of the sections -16- of different lengths corresponding to the distance between the threaded section -17- and different tool receiving holes 413-, so that the tool may be clamped in either one of Said holes by relatively slight endwise movement of the screw sections -17-.

The adjusting screw -3- is arranged in a lengthwise opening l8- in the liead -'lmainly at one side of the guide open ing -8- with which the opening l8- communicates, said adjusting screw being provided with an annular recess 19h for receiving a semi-circular rib -20- on the head -lfor holding the adjusting` screw against endwise movement while permittiim- `its free rotation in engagementv with the tool -B in case it should protrude beyond the inner side of the supporting section v-11. The adjusting screw -3- is threaded throughout its length except at the recess -l9- and extends inwardly from the outer end face of the adjacent portion of the head -la distance corresponding approximately to the length ot the section hlO- of the tool receiving member -2, or a sufficient distance from the axis of revolution of the head to permit the tool -B* to be brought into alinement with said axis without interfering with the adjusting screw.

The tool adjusting member -2- may be held in its adjusted position by one or more. in this instance 2, clamping screws -5-, one tor the section t0n and another tor the section ll, each screw having a swiveled section 22- jouinaled in a screw sectionv as 2B- and provided with a rib. as 2litor 'engagement in a lengthwise groove -25- in the adjacent side ot the corresponding sections -l0- and llfor holding said sections against relative rotary' movement and also tor frictionally binding them against the walls ot the opcning -8'- aga-inst endwise movement when adjusted torusc.

The object in providing the several tool openings l3-4 in the tool supporting seca relatively small vadjustment. ot said tool supporting member and its adjusting screw.

That is, when the tool is clamped in the innermost opening l3-. it may be de centered a distance corresponding approximately to thelength of the adjusting screw .-37 and section .mltlw engaged therewith.

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inseam-36` w :el

leaving an engageinent of just a sufficient number of threads'between those parts to assure prperl engagement between their threads. hen, it it is desired to cle-center the `tool to a further extent, it may be released by the loosening of the set screw 4- and withdrawn, wliereupon, the' adjusting screw -`-3- may be operatedto return the section --l0-- to its: starting position, thus permitting a corresponding return ot 'the section --ll-, at which time, the tool may be re-inserted in the second opening #13- andthescrew B again adjusted to beginthe cuttingoperation where it was lett ott at the end of the previous adjustment,

under which conditions, a shorter section -lG--could be used in connection withthe screw section w17--` to clamp the tool in the secondi opening 13e-k. j Y

In a similar manner,`when the cutting operation has been completed to the limit ot its radial movement with the tool in the second opening -13-, the set screw'may be loosened to release the tool, the parts 10- and -llreturnedto their starting positions and the tool re-inserted in the third opening -13- with a still shorter section w16- used in connection with the section -17- to reclamp the tool in said opening, so that the outward radial adjustment of the tool may be continued to the .limitof adjustment of the section -10-.

The adjusting screw -3- may be operated by handor automatically, and, for this purpose, is provided with an operating member -23-- commonly known as a star wheel which may be turned by hand at intervals as may be desired to cle-center the tool, or it may be operated automatically by engagement with a fixed abutment 24'- located in the path of movement of the outer ends of the arms ot' the star wheel, so that during each krevolution of the head, one of the arms will ride against the iXed abutment -,-24- and will thereby turn the screw one arm space at each of said revolutions of the y head to effect a step by step adjustment of ing member -2-, an adjusting chuck and permitting the work to be ro-- tated relatively thereto, the opposite end of the head l5-,being provided with a cylindrical, opening -.-8- extending diametrically therethrough from side to side for receiving and guiding the tool supporting 1nember,-2-, the outer end of' the opening *8C- being provided with a diametrically extending slot -9- of sufficient width to 70 `ing -13- similar to that previously de-` scribed ,tor receiving the tool B.

The setfscrew 4" 1s engaged 1n a v threaded soclretin one end vof the member 2- for clamping the tool-B in the se opening --13-, and is similar to the set screw previously described except that it is made inone piece.` j j w The adjusting screw -3- and the means for holding it` against 'endwise movement 90? and also the clamping screw -5- are similar to the corresponding partsV of the oonstruction shown in Figs.` l'to 6, inclusive, previously described, while the tool supporting member -2- consists of a single piece 95 with the tool opening near the center thereof, instead of being made in sections as shown in Figs. l to 6, inclusive.

It is evident that-the construction shown and described may be further modified without departing from the spirit of-my invention, and, therefore, I do not wish to limit myself to the precise construction shown and described.

What claim is: j

l. A tool chuck comprising a head having a diametrically extending opening therethrough, a tool-supporting member slidable endwise in said opening and provided with a lengthwise groove, a ribbed member mov'- 110 able in an opening in the head at one side of said member and projecting into said grooveto hold the tool-supporting member against turning, a set screw movable in the threaded opening in the head for tightening and releasing the ribbedv member againstand from the tool-supporting member for clamping said tool-supporting member, and means for adjusting the tool-supporting member endwise.

2, A' tool chuck comprising a head having a diametrically extending opening therethrough, a tool-supporting member slidable endwise in said opening and provided with a lengthwise groove, a set screw adjustable in a threaded opening in the head at one side of said member and provided with a ribbed section j ournaled therein to allow the screw section to turn relatively to the ribbed section for tightening M0 said ribbed sectionagainst the tool-support ing member, said ribbed section having its rib engaged 1n the groove of the tool-sup- Vporting member to' hold the latter against turning,` and a screw forV adjusting the toolsupp'orting member endwise.

3. toolchuck comprising a head having a transverse opening therein, a tool-supporting member slidable endwise in said opening and-provided withV a transverse tool-receiving opening intermediate its ends. Y

'us'tin screw against endwise movement. l g e 4. A tool chuck comprising a cylindrical head having a central lengthwise opening therethrough and a radial opening extending yfrom the peripheryof one side beyond the central lengthwise opening, one end of the central lengthwise opening being elongated radially in the direction of the length of the radial opening, a tool-supporting member slidable endwise in the radial opening and provided with a tool-receiving socket movable into and out of registration with the lengthwise opening as said member is adjusted endwise, said member having threaded portions at opposite sides of the tool-receiving socket. a set screw engaging one of said threaded portions for clamping the tool in its socket, another screw engaging the other threaded portion for adjusting the tool-supporting member endwise and means for holding the adjusting screw against endwise movement relative to the head.

In witness whereof I have hereunto set my hand this 24th day of July 1920.

JAMES CARR.

Witnesses H. E. CHASE, Rosin G. CARROLL. 

